CN105531957A - Method and apparatus for coordinated orthogonal channel access (COCA) - Google Patents

Abstract

A method and apparatus for coordinated orthogonal channel access (COCA) are described. A wireless transmit/receive unit (WTRU) of a plurality of WTRUs receives a trigger to transmit an uplink (UL) control frame on a channel simultaneously with at least one other of the plurality of WTRUs. The WTRU transmits the control frame on the channel in response to receiving the trigger.

Description

For coordinating the method and apparatus of orthogonal channel access (COCA)

The cross reference of related application

This application claims the U.S. Provisional Application No.61/724 submitted on November 9th, 2012, the rights and interests of 683, the content of this application is incorporated into this by reference.

Background technology

In infrastructure Basic Service Set (BSS) pattern, the access point (AP) that WLAN (wireless local area network) (WLAN) comprises BSS and the one or more stations (STA) be associated with this AP.This AP can have the access or the interface that pass in and out the wire/radio network of the other types of this BSS to distributed system (DS) or the business of carrying.Come from this BSS outer, arrive to the business of STA by this AP, this AP can be delivered to suitable STA.Come from STA, be sent to this AP to the business of the destination outside BSS, to be passed to each destination.

STA in BSS communicates with one another via equity (peer-to-peer) communication to each other.In the peer-to-peer communications of a type, source STA can send traffic to this AP, and this AP can be passed to destination STA.In the peer-to-peer communications of another kind of type, source STA can directly send traffic to destination STA, without the need to involving AP via the DLS using Institute of Electrical and Electric Engineers (IEEE) 802.11e direct link to set up (DLS) or IEEE802.11z tunnel DLS (TDLS).WLAN in independent BSS pattern does not have AP, and correspondingly, STA can direct communication each other.

Summary of the invention

Describe the method and apparatus for coordinating orthogonal channel access (COCA).At least another one in WTRU in multiple wireless transmitter/receiver unit (WTRU) and described multiple WTRU is received in channel simultaneously and uploads the triggering serving line link (UL) control frame.In response to this triggering of reception, this WTRU transmits this control frame on this channel.The method and apparatus that the disclosure describes can be used in various wireless medium, but is not limited to 802.11ah, 802.11 very high frequency(VHF) spectrum efficiencies (VHSE), 802.11WNG, 802.11n and 802.11ac.

Accompanying drawing explanation

Can obtain more detailed understanding from following description, these descriptions provide by reference to the accompanying drawings by way of example, wherein:

Figure 1A is the system diagram of the example communication system can implementing one or more disclosed execution mode wherein;

Figure 1B is the system diagram of the example wireless transmitter/receiver unit (WTRU) that can be used in the communication system shown in Figure 1A;

Fig. 1 C is the system diagram that can be used in exemplary radio Access Network in the communication system shown in Figure 1A and exemplary core net;

Fig. 2 be WiFi system for using point coordination function (PCF), at the signal graph using the uplink data of coordination function (CF)-poll to transmit without contention (CFP) period.

Fig. 3 is for Institute of Electrical and Electric Engineers (IEEE) 802.11 power saving mode, signal graph based on down link (DL) data retrieval (retrieval) of service indication message (TIM);

Fig. 4 is the figure that the exemplary coordination orthogonal channel in capability information element (IE) or field accesses that (COCA) supports son field;

Fig. 5 is the flow chart of the illustrative methods of COCA grouping;

Fig. 6 is the figure of exemplary unicast COCA group configuration IE;

Fig. 7 is the figure of the exemplary group i information field for clean culture COCA group configuration IE;

Fig. 8 is the figure of exemplary Broadcast COCA fabric anomaly IE;

Fig. 9 is the figure of the exemplary group i information field for broadcasting COCA group configuration IE;

Figure 10 is the figure for broadcasting the Exemplary members k information field in the group i information field of COCA group configuration IE;

Figure 11 is the flow chart of the illustrative methods of COCA fabric anomaly;

Figure 12 is the signal graph of the illustrative methods of carrying out the synchronous of COCA ul transmissions and timing;

Figure 13 uses COCA to the signal graph of the illustrative methods that CF-poll responds;

Figure 14 is the timing of power-save poll (PS-poll) for COCADL data retrieval and the signal graph of synchronous method;

Figure 15 is the timing of power-save poll (PS-poll) and the signal graph of synchronous method that use COCA, and wherein COCA transmission is synchronized to predefined up link (UL) and accesses interval or window;

Figure 16 be according to the method for Figure 15 for the timing of response made CF-poll and synchronous signal graph 1600;

Figure 17 is that the COCA of use for the method for Figure 15 and 16 is to the timing of the response that CF-poll is made and synchronous signal graph;

Figure 18 is the signal graph of the illustrative methods of the orthogonal COCA sequence that pre-assignment is transmitted for COCA;

Figure 19 is the signal graph of illustrative methods selected for the STA of the orthogonal COCA sequence of COCA transmission;

Figure 20 is the exemplary signal figure using the UL data transmitted the COCA of the response that CF poll is made to transmit; And

Figure 21 is the figure of the exemplary COCA frame carrying message and/or information.

Embodiment

Figure 1A is the figure of the example communication system 100 can implementing one or more disclosed execution mode wherein.Communication system 100 can be multi-access systems, and it provides the content of such as voice, data, video, Message Transmission, broadcast etc. to multiple wireless user.Communication system 100 can make multiple wireless user can pass through to visit this type of content to the shared of system resource comprising wireless bandwidth.Such as, communication system 100 can adopt one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), Orthodoxy Frequency Division Multiplex (OFDM), orthogonal FDMA (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) etc.

As shown in Figure 1A, communication system 100 can comprise wireless transmitter/receiver unit (WTRU) 102a, 102b, 102c, 102d, radio access network (RAN) 104, core network 106, public switched telephone network (PSTN) 108, internet 110 and other networks 112, but be understandable that, disclosed execution mode can consider any amount of WTRU, base station, network and/or network element.Each in WTRU102a, 102b, 102c, 102d can be the equipment being configured to any type carrying out in wireless environments operating and/or communicating.Exemplarily, WTRU102a, 102b, 102c, 102d can be configured to transmit and/or receive wireless signal and can comprise subscriber equipment (UE), mobile radio station, stand (STA), fixing or mobile subscriber unit, beep-pager, cellular phone, personal digital assistant (PDA), smart phone, laptop computer, net book, personal computer, wireless senser, consumer-elcetronics devices etc.

Communication system 100 can also comprise base station 114a and base station 114b.Each in base station 114a, 114b can be the equipment being configured to any type of wirelessly docking with at least one in WTRU102a, 102b, 102c, 102d, so that to such as core network 106, internet 110, and/or the access of one or more communication networks of other networks 112.Exemplarily, base station 114a, 114b can be base transceiver station (BTS), Node B, e Node B, Home Node B, family expenses e Node B, site controller, access point (AP), wireless router etc.Although base station 114a, 114b are each be all depicted as discrete component, be understandable that, base station 114a, 114b can comprise base station and/or the network element of any amount of interconnection.

Base station 114a can be a part of RAN104, RAN104 can also comprise other base stations and/or network element (not shown), such as base station controller (BSC), radio network controller (RNC), via node etc.Base station 114a and/or base station 114b can be configured to transmit in the specific geographic district that can be called as community (not shown) and/or receive wireless signal.Community can be divided into cell sector further.Such as, the community be associated with base station 114a can be divided into three sectors.Therefore, in one embodiment, base station 114a can comprise three transceivers, that is, each sector for community uses a transceiver.In another embodiment, base station 114a can adopt multiple-input and multiple-output (MIMO) technology, and, therefore, multiple transceiver can be used for each sector of community.

Base station 114a, 114b can be communicated with one or more in WTRU102a, 102b, 102c, 102d by air interface 116, this air interface 116 can be any suitable wireless communication link (such as, radio frequency (RF), microwave, infrared ray (IR), ultraviolet (UV), visible ray etc.).Any suitable radio access technologies (RAT) can be used to set up air interface 116.

More specifically, as mentioned above, communication system 100 can be multi-access systems and can adopt one or more channel access schemes (such as CDMA, TDMA, FDMA, OFDM, OFDMA, SC-FDMA etc.).Such as, base station 114a and WTRU102a in RAN104,102b, 102c can implement the radiotechnics of such as Universal Mobile Telecommunications System (UMTS) terrestrial radio access (UTRA) and so on, and it can use wideband CDMA (WCDMA) to set up air interface 116.WCDMA can comprise the communication protocol of such as high-speed packet access (HSPA) and/or evolved HSPA (HSPA+) and so on.HSPA can comprise high-speed downlink packet access (HSDPA) and/or High Speed Uplink Packet access (HSUPA).

In another embodiment, base station 114a and WTRU102a, 102b, 102c can implement the radiotechnics of such as Evolved UMTS Terrestrial radio access (E-UTRA) and so on, and it can use Long Term Evolution (LTE) and/or senior LTE (LTE-A) to set up air interface 116.

In other implementations, base station 114a and WTRU102a, 102b, 102c can implement the radiotechnics of the enhanced data rates (EDGE), GSMEDGE (GERAN) etc. of such as IEEE802.16 (that is, worldwide interoperability for microwave access (WiMAX)), IEEE802.11, CDMA2000, CDMA20001X, CDMA2000EV-DO, Interim Standard 2000 (IS-2000), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), global system for mobile communications (GSM), GSM evolution.

Base station 114b in Figure 1A can be such as wireless router, Home Node B, family expenses e Node B or access point, and the wireless connections that any suitable RAT can be utilized to promote in the regional area of such as place of business, house, vehicle, campus etc.In one embodiment, base station 114b and WTRU102c, 102d can implement the radiotechnics of such as IEEE802.11 to set up WLAN (wireless local area network) (WLAN).In another embodiment, base station 114b and WTRU102c, 102d can implement the radiotechnics of such as IEEE802.15 to set up Wireless Personal Network (WPAN).In another execution mode, base station 114b and WTRU102c, 102d can utilize the RAT (such as, WCDMA, CDMA2000, GSM, LTE, LTE-A etc.) based on honeycomb to set up picocell or Femto cell.As shown in Figure 1A, base station 114b can have the direct connection to internet 110.Therefore, base station 114b can enter the Internet 110 via core network 106.

RAN104 can communicate with core network 106, and core network 106 can be configured to the network to the one or more any types providing voice, data, application and/or the voice (VoIP) by Internet protocol to serve in WTRU102a, 102b, 102c, 102d.Such as, core network 106 can provide Call-Control1, billing of services, service, prepaid call, Internet connection, video distribution etc. based on shift position, and/or performs the enhanced security feature of such as user authentication.Although not shown in figure ia, be understandable that, RAN104 and/or core network 106 directly or indirectly can communicate from adopting other RAN of the RAT identical with RAN104 or different RAT.Such as, except be connected to just may utilize E-UTRA radiotechnics RAN104 except, core network 106 also can communicate with adopting another RAN (not shown) of gsm radio technology.

Core network 106 can also serve as the gateway that WTRU102a, 102b, 102c, 102d access PSTN108, internet 110 and/or other network 112.PSTN108 can comprise the circuit exchanging telephone network providing plain old telephone service (POTS).Internet 110 can comprise the computer network of interconnection and the global system of equipment, the transmission control protocol (TCP) in this computer network and equipment use such as transmission control protocol (TCP)/Internet protocol (IP) the Internet protocol suite, the common communicating protocol of User Datagram Protoco (UDP) (UDP) and Internet protocol (IP) and so on.Network 112 can comprise the wired or wireless communication network that other service provider has and/or runs.Such as, network 112 can comprise another core network being connected to one or more RAN, and this one or more RAN can adopt the RAT identical from RAN104 or different RAT.

Some or all of in WTRU102a, 102b, 102c, 102d in communication system 100 can comprise multi-mode ability, that is, WTRU102a, 102b, 102c, 102d can comprise and carry out by different wireless links and different wireless networks multiple transceivers of communicating.Such as, the WTRU102c shown in Figure 1A can be configured to communicate with the base station 114a of the radiotechnics that can adopt based on honeycomb, and communicates with adopting the base station 114b of IEEE802 radiotechnics.

Figure 1B is the system diagram of exemplary WTRU102.As shown in fig. 1b, WTRU102 can comprise processor 118, transceiver 120, transmitting/receiving element 122, loud speaker/microphone 124, keyboard 126, display/touch pad 128, irremovable storage device 130, removable memory 132, power supply 134, global positioning system (GPS) chipset 136, and other ancillary equipment 138.Be understandable that, WTRU102 can comprise any sub-portfolio of said elements, and is consistent with execution mode simultaneously.

Processor 118 can be general processor, the integrated circuit (IC), state machine etc. of application specific processor, conventional processors, digital signal processor (DSP), multi-microprocessor, the one or more microprocessors associated with DSP nuclear phase, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any other type.Processor 118 can executive signal coding, data processing, power control, I/O process, and/or any other function that WTRU102 can be run in wireless environments.Processor 118 can be coupled to transceiver 120, and this transceiver 120 can be coupled to transmitting/receiving element 122.Although processor 118 is depicted as with transceiver 120 parts be separated by Figure 1B, be understandable that, processor 118 and transceiver 120 can be integrated in Electronic Packaging or chip jointly.

Transmitting/receiving element 122 can be configured to by air interface 116 to (such as, base station 114a) transmission signal, or from base station received signal.Such as, in one embodiment, transmitting/receiving element 122 can be the antenna being configured to transmit and/or receive RF signal.In another embodiment, transmitting/receiving element 122 can be the transmitter/detector being configured to transmit and/or receive such as IR, UV or visible light signal.In another execution mode, transmitting/receiving element 122 can be configured to transmit and receive RF and light signal.Be understandable that, transmitting/receiving element 122 can be configured to any combination transmitting and/or receive wireless signal.

In addition, although transmitting/receiving element 122 is depicted as discrete component in fig. ib, WTRU102 can comprise any amount of transmitting/receiving element 122.More specifically, WTRU102 can adopt MIMO technology.Therefore, in one embodiment, WTRU102 can comprise two or more the transmitting/receiving elements 122 (such as, multiple antenna) for being transmitted and received wireless signal by air interface 116.

Transceiver 120 can be configured to being modulated by the signal transmitted by transmitting/receiving element 122 and carrying out demodulation to the signal received by transmitting/receiving element 122.As mentioned above, WTRU102 can have multi-mode ability.Therefore, transceiver 120 can comprise and makes WTRU102 can carry out via multiple RAT of such as such as UTRA with IEEE802.11 multiple transceivers of communicating.

The processor 118 of WTRU102 can be coupled to lower device, and user input data can be received from it: loud speaker/microphone 124, keyboard 126 and/or display/touch pad 128 (such as, liquid crystal display (LCD) display unit or Organic Light Emitting Diode (OLED) display unit).Processor 118 can also export user data to loud speaker/microphone 124, keyboard 126 and/or display/touch pad 128.In addition, processor 118 can access the information of the suitable memory of any type from such as irremovable storage device 130 and/or removable memory 132 and so on, and stores data in wherein.Irremovable storage device 130 can comprise the memory storage device of random access memory (RAM), read-only memory (ROM), hard disk or any other type.Removable memory 132 can comprise subscriber identity module (SIM) card, memory stick, secure digital (SD) storage card etc.In other implementations, processor 118 can be accessed from not physically being positioned at the information of the memory that WTRU102 (is such as positioned on server or home computer (not shown)) and storing data in wherein.

Processor 118 can receive electric power from power supply 134, and can be configured the electric power distributing and/or control to other assemblies in WTRU102.Power supply 134 can be used to any suitable equipment that WTRU102 powers.Such as, power supply 134 can comprise one or more dry cell batteries (such as, NI-G (NiCd), nickel zinc (NiZn), ni-mh (NiMH), lithium ion (Li ion) etc.), solar cell, fuel cell etc.

Processor 118 can also be coupled to GPS chipset 136, and this GPS chipset 136 can be configured to the positional information (such as, longitude and latitude) of the current location provided about WTRU102.As supplementing or replacing the information from GPS chipset 136, WTRU102 can determine its position by air interface 116 from base station (such as, base station 114a, 114b) receiving position information and/or based on the timing receiving signal from two or more contiguous base stations.Be understandable that, WTRU102 can obtain positional information by any suitable location determining method, and is consistent with execution mode simultaneously.

Processor 118 can also be coupled to other ancillary equipment 138, and this other ancillary equipment 138 can comprise the feature, one or more software of function and/or wired or wireless connection and/or the hardware module that provide additional.Such as, ancillary equipment 138 can comprise accelerometer, electronic compass, satellite transceiver, digital camera (for photo or video), USB (USB) port, vibratory equipment, television transceiver, Earphone with microphone, module, frequency modulation (FM) radio unit, digital music broadcasting machine, media player, video game machine module, explorer etc.

Fig. 1 C is the system diagram of RAN104 according to a kind of execution mode and core network 106.As mentioned above, RAN104 can adopt E-UTRA radiotechnics to be communicated with WTRU102a, 102b, 102c by air interface 116.RAN104 can also communicate with core network 106.

RAN104 can comprise e Node B 140a, 140b, 140c, but is understandable that, RAN104 can comprise any amount of e Node B, and is consistent with execution mode simultaneously.E Node B 140a, 140b, 140c be each can comprise one or more transceivers for being undertaken communicating by air interface 116 and WTRU102a, 102b, 102c.In one embodiment, e Node B 140a, 140b, 140c can implement MIMO technology.Therefore, e Node B 140a such as can use multiple antenna to come to transmit wireless signal to WTRU102a, and receives wireless signal from WTRU102a.

Each in e Node B 140a, 140b, 140c can be associated with specific cell (not shown) and can be configured to process provided for radio resources management decision-making, the user scheduling transferred in decision-making, up link and/or down link etc.As is shown in fig. 1 c, e Node B 140a, 140b, 140c can by X2 interface with communicate each other.

Core network 106 shown in Fig. 1 C can comprise Mobility Management Entity (MME) 142, gateway 144, and packet data network (PDN) gateway 146.Although each in said elements is depicted as a part for core network 106, be understandable that, in these elements any one can have by the entity except core network carrier and/or run.

MME142 can be connected to the e Node B 142a in RAN104, each in 142b, 142c via S1 interface, and can serve as Controlling vertex.Such as, MME142 can be responsible for the user of certification WTRU102a, 102b, 102c, bearing activation/deexcitation, between the initial setting stage of WTRU102a, 102b, 102c, select particular service gateway etc.MME142 can also provide control plane function for RAN104 and adopt such as GSM or WCDMA and so on other radiotechnics other RAN (not shown) between switching.

Gateway 144 can be connected to the e Node B 140a in RAN104, each in 140b, 140c via S1 interface.Usual gateway 144 can to/from WTRU102a, 102b, 102c route and forward user data packets.Gateway 144 can also perform other functions, such as between e Node B grappling user plane between the handover period, trigger the context etc. of paging, management and storage WTRU102a, 102b, 102c when down link data can be used for WTRU102a, 102b, 102c.

Gateway 144 can also be connected to PDN Gateway 146, this PDN Gateway 146 can be provided to the access of the packet switching network of such as internet 110 to WTRU102a, 102b, 102c, to promote the communication between WTRU102a, 102b, 102c and IP enabled devices.The couple in router (AR) 150 of WLAN (wireless local area network) (WLAN) 155 can communicate with internet 110.AR150 can promote the communication between AP160a, 160b and 160c.AP160a, 160b can communicate with 170c with STA170a, 170b with 160c.

Core network 106 can promote the communication with other network.Such as, core network 106 can be provided to the access of the circuit-switched network of such as PSTN108 to WTRU102a, 102b, 102c, to promote the communication between WTRU102a, 102b, 102c and conventional land line communication equipment.Such as, core network 106 can comprise the IP gateway (such as, IP Multimedia System (IMS) server) of the interface served as between core network 106 and PSTN108, or can communicate with this IP gateway.In addition, core network 106 can be provided to the access of network 112 to WTRU102a, 102b, 102c, this network 112 can comprise other wired or wireless network of having by other service provider and/or runing.

Fig. 2 be WiFi system for using point coordination function (PCF), at the signal Figure 200 using up link (UL) data of coordination function (CF)-poll to transmit without contention (CFP) period.Shown in figure 2 in example, BSS comprises AP202 and STA202,204 and 206.During CFP, AP202 can use and carry out STA (such as 202,204 and 206) in poll BSS to inquire whether they have the UL data that will transmit without contention poll (CF-poll) frame.In the example shown in fig. 2, AP202 transmits the CF-poll 210 for STA210.This CF-poll can comprise transmission opportunity (TXOP), and STA polled during this transmission opportunity can transmit any UL data for transmitting that it has.In the example shown in fig. 2, STA204 has the UL data for transmitting, and transmits data 216 after short interFrameGap (SIFS) 220, STA204 after CF-poll 210.

When the data that polled STA will not transmit, polled STA can not respond to this CF-poll.In the example present, when AP does not detect the response from the STA of institute's poll in PCF interFrameGap (PIFS), it can the next STA of poll.Shown in figure 2 in example, after STA204 transfers its data 216, transmit the CF-poll 212 for next STA after SIFS222, AP202.CF-poll 212 can comprise the confirmation (ACK) to the data 216 that STA204 transmits.In this example, next STA may without any the UL data that will transmit, so it can not respond to CF-poll 212.Correspondingly, AP202 can not receive response from next STA, and after PIFS224, AP can transmit the CF-poll 214 for next STA206.STA206 has the data that will transmit, so can transmit data 218 after SIFS226, STA206 after CF-poll 214.This process can repeat always, and (through and comprise last STA208) all has the chance transmitting its UL data until all STA in BSS.

Fig. 3 is for IEEE802.11 power saving mode, signal graph 300 based on down link (DL) data retrieval of service indication message (TIM).In example shown in Fig. 3, BSS comprises AP302, medium 304 and STA306 and 308.AP302 can know the power saving mode of its any STA, and correspondingly can be in the data of the STA of sleep (doze) state by buffer memory, and use the TIM in beacon frame 310 or transmit the DL data that TIM (DTIM) notices its its buffer memory promising of those STA.During sleep state, by enter sleep state and listen for beacons of waking up to receive TIM or DTIM thus to determine whether this AP has represented one or more STA buffer memory business, one or more STA can realize power save.If STA receives instruction certainly in TIM, it can save poll (PS-poll) control frame to retrieve the frame be buffered from this AP to this AP transmitted power.When multiple STA has when the frame of AP place buffer memory, one or more STA can use free backoff algorithm before transmission PS-poll frame.

In the example shown in fig. 3, STA306 and STA308 receives TIM instruction certainly in beacon 310.STA306 transmits its PS-poll 316 by medium 304, and wait-receiving mode AP302 represents the data 312 of its institute's buffer memory.Its ACK318 for data 312 is transmitted in response to receiving data 312, STA306.Similarly, STA308 can transmit its PS-poll 320 and this AP of wait-receiving mode represent the data 314 of its buffer memory.Its ACK322 for data 314 can be transmitted in response to receiving data 314, STA308.

In response to newly-designed explore frame, IEEE802.11 considers several possibility simultaneously sending ACK.This possibility comprising the group that STA is divided into group, transmission detects STA, not having the STA of data to send ACK, AP transfer of data by using parallel ACK and the AP scheduling of Zadoff-Chu sequence solution and initiation to have null value (PULL) according to the mode of time alignment simultaneously.

Wlan system is being required the increasing STA supporting each BSS.Such as, IEEE802.11ah system can be required to support up to 6,000 equipment.

But when a large amount of STA competitive channels accesses, the distributed coordination function (DCF) for wlan system may be inefficiency, especially in throughput and energy ezpenditure.Such as, based in the DL data retrieval of TIM, when a large amount of STA in BSS have the affirmative instruction in TIM, conflict may be there is between ULPS-poll frame.This can cause the long delay of DL data retrieval.

And although PCF can provide without contention access, it may be useful in a large amount of expenses of STA being carried out to order poll.Such as, when a large amount of STA in BSS have burst UL business, because need to use CF-poll to carry out poll to each STA one by one, so use CF-poll to dispatch (airtime) expense when UL transfer of data can consume too much empty.

Correspondingly, can UL transmission while enable control channel in this execution mode described, such as, to improve the spectrum efficiency of network and to reduce data transmission delay.Such as, coordinating orthogonal channel access (COCA) mechanism can UL transmission while enable multiple control frame, slows down the interference in other cases between contingent UL transmission simultaneously.COCA mechanism can comprise support COCA process ability instruction, configuration for COCA operation, COCA operation and process synchronous, multiple COCA frames identification and/or on COCA frame carry information.

The grouping mechanism of IEEE802.11 is only for designed by DL multi-user's multiple-input and multiple-output (MIMO).Correspondingly, this design does not comprise any mechanism for UL fabric anomaly.In addition, in order to make AP carry out effective user grouping, it can obtain the enough information about STA, and this process can increase overhead.Correspondingly, the grouping of UL transmission while this execution mode described can provide for control channel and group management scheme, it can obtain information about STA in order to make AP and can effectively and divide into groups efficiently by limited expense.

In described herein the execution mode about the exemplary IEEE802.11 network comprising STA and AP.But this STA and AP can be the WTRU be suitable for and the base station of any type.

The STA relating to COCA transmission may need first to be configured to use them.Such as, STA can be configured to indicate STA to support the COCA operation of any execution mode used in multiple different execution mode to AP.

In one embodiment, by arrange STA management or control frame (such as, association request and response frame, probe request/response frame or beacon) in the capability information element (IE) in order to indicate its operation carrying out the type of having the ability, STA (such as, the STA of AP or non-AP) can indicate it for the ability of COCA process or simultaneously multiple frame transmission/reception.COCA supports son field, such as, can be added to the capability information field in association request and response frame.When STA supports COCA transmission (or dot11COCAOptionImplemented (some 11COCA selects to implement) is true), STA can set this son field as " 1 ", otherwise and is " 0 ".In another embodiment, the COCA in information field supports that son field can comprise the ability information of each application (such as, to response or the ULPS-poll of CF-poll) for multiple frame transmission simultaneously.

Fig. 4 is the figure that exemplary COCA in ability IE or field supports son field 400.This exemplary COCA supports that son field 400 comprises multiple frame 402,404,406 and 408.But COCA supports that son field can comprise the frame of any amount, wherein each frame can comprise support for STA while the ability information of application-specific of multiple frame transmission.In example shown in Figure 4, frame 402 indicates STA to have and supports the ability that the COCA of ULPS-poll transmits, frame 404 indicates STA to have to support the ability to receiving COCAULPS-poll frame and receiving, frame 406 indicates STA to have and supports the ability transmit the COCA of multiple responses that CF-poll is made, and frame 408 indicates STA to have support to respond to the COCA made for CF-poll the ability received.

In another embodiment, the ability for COCA transmission/reception can be instructed in such as COCA tenability IE.

Be intended to by be used for from UL frame multiple while one or more STA application-specific or process AP can such as based on its in ability IE or COCA tenability IE while multiple frame transmission/reception son field determine whether the STA fixed one's mind on has the ability supporting simultaneously multiple UL frame transmission.

The IEEE802.11ac grouping process of amendment or new grouping process can be used to divide into groups to the STA fixed one's mind on transmitted for COCA.New grouping process can use predetermined grouping strategy or adhoc strategy can be used to divide into groups.

In order to realize COCA process, can divide into groups to STA according to one or more criterion.This one or more criterion can comprise the received power of such as channel of operation width, AP, service quality (QoS) priority/demand, synchronous, dispatching requirement, sleep scheduling, locus, the characteristic of channel, STA ability and preference, STA type (such as transducer/instrument or conventional WiFi equipment), power constraint, operator scheme or channel quality.COCA group can be defined for different object (response such as made CF-poll or PS-poll).

Fig. 5 is the flow chart of the illustrative methods 500 of COCA grouping.In example shown in Figure 5, AP selects STA to form subset 1 (502).This AP alternative if any COCA ability, have identical STA type, ability or kind (such as, instrument/transducer or honeycomb unloading), have similar sleep scheduling and/or use the STA in similar cycle.AP also can select STA to form candidate subset 2 (504) from candidate subset 1, and wherein the received power at the AP place of such as each STA is in this set similar each other.Accurate excursion between the STA in subset 2 can be dependent on the power-handling capabilities of orthogonal preambles code (preamble) design, AP receiver ability, type or STA.When above use term lead code, those having ordinary skill in the art will appreciate that lead code also can be sequence (such as IEEE802.11WiFi sequence), and also can refer to the sequence/lead code in paragraph below.

AP also can select STA to form candidate subset 3 (506) from candidate subset 2, and the propagation delay in the STA wherein divided into groups can be similar.Time delay range in STA in subset 3 can be dependent on the timing adjustment ability of such as orthogonal sequence/lead code design, protection interval (GI) value, BSS covering radius and/or STA.Final COCA group also can be dependent on maximum COCA group size restriction (508), its be limited to such as can the quantity of orthogonal sequence/lead code and/or the maximum quantity of orthogonal sequence/lead code that can decode of AP.

AP can use the frame comprising COCA group configuration information element (IE) or field (such as below with reference to any COCA group configuration IE that Fig. 6-10 describes) to notify their grouping to STA.In order to realize this purpose, AP can transfer management or control frame to one or more STA, this management or control frame use group configuration or IE or field.AP also can transmit other information to one or more STA in management or control frame.

The STA being assigned to COCA group also can be assigned to the group defined by 802.11acIE group identifier.In one embodiment, COCAIE group identifier can be used in mode that is that add relative to IEEE802.11acIE group identifier, parallel and/or that replace.

In described herein dissimilar COCA group configuration IE, comprise clean culture group configuration IE and broadcast group configuration IE.

Fig. 6 is the figure of exemplary unicast COCA group configuration IE600.Exemplary unicast COCA group configuration IE600 comprise element IE field 602, length field 604, group amount field 606 and group i (i=1 ..., N) and information field 608 and 610.It is clean culture COCA group configuration IE that Element ED field 602 can identify this IE, and length field 604 can indicate the length of this IE, and group amount field 606 can indicate the quantity of the group be included in this IE.Each in group i information field (such as, organizing 1 information field 608 and group N information field 610) can comprise group membership (groupmembership) information of STA.Because STA can be included in the group of any amount, so the quantity being included in the group i information field in clean culture COCA group configuration IE is variable.

Fig. 7 is the figure of the exemplary group i information field 700 for clean culture COCA group configuration IE.Exemplary group i information field 700 comprises group id field 702, type field 704, Option Field 706, order field 708, orthogonal preambles code assignment field 710, launches (Tx) power field 712 and timing field 714.Group ID702 can be the ID of the group that one or more STA is subordinate to.Type field 704 can comprise the information of the type about the group indicated by ID702.In one embodiment, the type of group can be the group of ULPS-poll group, CF-poll response group or other any types simultaneously.Option Field 706 may be implemented as bitmap or indicates the information of which type to be included in other codings of the remainder of group i information field 700.

Order field 708 can indicate the order of the STA in group, so that follow the sequential delivery in the group after COCA transmission.Orthogonal preambles code assigns the assignment that field 710 can indicate orthogonal sequence/lead code assignment of STA or the orthogonal sequence/lead code set for the STA in group.Use this field, orthogonal COCA sequence can be divided each STA tasked in group by AP, or orthogonal COCA arrangement set is divided the one group of STA tasking and be configured for multiple frame transmission simultaneously.Orthogonal sequence/lead code selective rule also can be included in this field.Tx power field 712 can indicate when carry out in current group COCA transmission time this STA should in order to transmit transmitting power.Timing field 714 can indicate the time delay that STA must adjust it when participating in the COCA transmission of AP in current group.This time delay in order to the difference of adjustment from the propagation delay of each STA, can make COCAUL be grouped in GI and arrives AP.This time delay can be positive bearing, and two's complement (2 ' scomplement) can be used to realize.

In one embodiment, AP manages one or more COCA group by transmitting the broadcast frame comprising broadcast COCA fabric anomaly IE or field simultaneously.

Fig. 8 is the figure of exemplary Broadcast COCA fabric anomaly IE800.Shown broadcast COCA fabric anomaly IE800 comprise Element ED field 802, length field 304, group amount field 806 and group i (i=1 ..., N) and information field 808 and 810.Element ED field 802 identifiable design IE is broadcast COCA group configuration IE.Length field 804 can indicate the length of broadcast COCA group configuration IE.Group amount field 806 can indicate the quantity of the group be included in broadcast COCA group configuration IE.Each (such as, group information field 808 and 810) in group i information field can comprise the information about group membership, and has carried out description specifically below with reference to Fig. 9 to it.

Fig. 9 is the figure of the exemplary group i information field 900 for broadcasting COCA group configuration IE.The group i information field 900 illustrated comprises group id field 902, type field 904, number of members field 906 in group and member k (k=1 to K) information field 908 and 910.Group id field 902 can comprise the ID of the group that one or more STA is subordinate to.Type field 904 can comprise the information of the type of the group be subordinate to about this one or more STA.This field can be the group of ULPS-poll group, CF-poll response group or other types simultaneously in order to instruction such as this group.Number of members field 906 in group can comprise the information of the quantity about STA included in group, and can be indicated by group ID.Each (such as information about firms field 908 and 910) in member k information field can comprise the information of the member STA in group.

Figure 10 is the figure of the Exemplary members k information field 1000 of group i information field for broadcasting COCA group configuration IE.Exemplary members k information field 1000 comprises member id son field 1002, option subfields 1004, order son field 1006, orthogonal preambles code assignment son field 1008, Tx power son field 1010, timing son field 1012.Member id son field 1002 can comprise the ID of member STA, and it can be implemented as association ID (AID), MAC Address or AP with STA reach an agreement on consistent other forms of ID.Option subfields 1004 can be implemented as bitmap or indicate the information of which type to be included in other codings of the remainder of member k information field 1000.Order son field 1006 can comprise the information of the order about the STA in group, so that follow the sequential delivery in the group after COCA transmission.Orthogonal preambles code assigns the assignment that son field 1008 can comprise orthogonal sequence/lead code assignment of STA or the orthogonal orthogonal sequence/lead code set for the STA in group.Use this son field, orthogonal COCA sequence can be divided each STA tasked in group by AP, or orthogonal COCA arrangement set is divided the one group of STA tasking and be configured for multiple frame transmission simultaneously.Orthogonal sequence/lead code selective rule also can be included in this field.Tx power son field 1010 can comprise should in order to the information of the transmitting power of transmission about this STA when carrying out COCA transmission in current group.Timing son field 1012 can comprise must to the information of the time delay that it adjusts about the STA when participating in the COCA transmission of AP in current group.This time delay can, in order to the difference of adjustment from the propagation delay of each STA, make COCAUL divide into groups to arrive AP in GI.This time delay can be positive bearing, and two's complement (2 ' scomplement) can be used to realize.

Figure 11 is the flow chart 1100 of the illustrative methods of COCA fabric anomaly.In example shown in Figure 11, STA is divided into information required in COCA group and is collected (1102).In one embodiment, AP such as by following grouping information acquisition process as above, can collect from STA and STA is divided into information required COCA group.Then STA is divided into (1104) in COCA group.In one embodiment, STA, by following the group selection process of such as one as above, is divided in COCA group and is such as divided in the different COCA groups for different object (response such as made CF-poll or ULPS-poll) by AP.STA then can notified this grouping (1106).In one embodiment, AP can send the unicast frame with clean culture COCA fabric anomaly information element or field to specific STA.Then its parameter is adjusted according to what define in the group information field for suitable group when this STA can transmit in the COCA group participating in association.In another embodiment, AP can send the broadcast frame with broadcast COCA group configuration managing I E or field to all STA.Then each STA can when the COCA group transmission participating in association according to adjusting its parameter indicated by the information about firms field in suitable group information field.

After AP establishes COCA group, the situation of the STA in group can change along with the time.Such as, STA type can change or STA can no longer in the coverage of this BSS.Can safeguard to hold these changes to group.In order to safeguard group, AP and STA can monitor the channel between them in order to object that COCA group is safeguarded, and AP can perform group and again assigns when being necessary and if necessary.AP or STA can initiate to organize maintenance process.

In an example of the COCA group maintenance process of AP initiation, AP can monitor the channel between AP and STA.If STA type or sleep scheduling change, or the change (such as path loss or propagation delay) on channel exceeds predetermined threshold, AP can use when needed and again assign to carry out COCA group about the group selection process of STA and up-to-date information.

In an example of the COCA group maintenance process initiated at STA, AP can indicate STA should monitor channel between AP and STA.STA estimates the channel condition information about channel loss, temporal information (time-of-day, TOD) clock skew, propagation delay etc. by use beacon frame.If STA detects that change exceedes predetermined threshold, STA can transmit new information to AP.AP can use when needed and again assign to carry out COCA group about the group selection process of STA and up-to-date information.

Arbitrary standards in use IEEE802.11n/ac/af/ah standard can be synchronous with AP on the primary channel during initiating the process of establishing between AP and STA to the STA that AP carries out transmitting.This in the special time cycle be substantially unique user transmission UL operation and comprise single or multiple user transmission DL operation may be enough.Providing as guaranteeing that these transmit the timing and aligning arrived in predetermined guard time needed for AP in this execution mode described, can detect them rightly to make the AP when multiple control frame is transmitted simultaneously.

Use the COCA frame from the orthogonal sequence/lead code of different STA to need by synchronous in a certain scope, this scope can be dependent on the design of COCA sequence.Describe for the synchronous method from the COCA frame without STA below with reference to Figure 12-17.

Figure 12 is the signal graph 1200 COCAUL transmission being carried out to timing and synchronous illustrative methods.In the example depicted in fig. 12, AP1202 uses down link management control frame 1208 to trigger the response frame from the STA (such as, STA1204 and 1206) using COCA process.From STA1204 and 1206 each COCA transmit 1212a and 1212b can be aligned in COCA trigger frame 1208 ending add interFrameGap (IFS).In the example depicted in fig. 12, IFS is short interFrameGap (SIFS) 1210a and 1210b.In one embodiment, synchronously can occur in COCA group as above.

Figure 13 uses COCA to respond the signal graph 1300 of the illustrative methods of CF-poll.In the example depicted in fig. 13, AP1302 transmits CF-poll 1310.AP1302 can be used in the one or more bits in the CF-poll frame of amendment in Physical Layer Convergence process (PLCP) header or MAC header, carrys out explicitly signal and sends the instruction response made for CF-poll frame 1310 being carried out to COCA transmission.Alternatively, AP1302 can be used in pattern in the CF-poll frame of amendment in PLCP header or pilot tone (pilot) value, seed is initiated in the relative phase change in signal (SIG) field, cyclic redundancy check (CRC) (CRC) mask, scrambling, comes implicitly to send with signal the instruction response made for CF-poll frame 1310 being carried out to COCA transmission.Alternatively, in association response frame, can send with signal the configuration response made for CF-poll frame being carried out to COCA transmission.Also can carry in CF-poll frame 1310 by the group ID of the STA of CF-poll 1310 polls.Alternatively, organize broadcast address can be used in destination-address (DA) field in MAC header.

Should, by the CF-poll frame 1310 transmitted, have each STA of UL data can transmit its response in group once receive instruction COCA response from AP1302, it can be aligned at CF-poll frame 1310 ending received and add IFS.In the example shown in Figure 13, each in STA1304,1306 and 1308 transmits respective response 1314a, 1314b and 1314c after the SIFS cycle 1312 after CF-poll frame 1310 terminates.

AP1310 can receive and successfully detect that transmit in COCA mode, that make CF-poll frame 1310 response 1314a, 1314b and 1314c, and, responsively, AP1310 can respond in order to notice it UL transmitting and scheduling of STA be detected by transmission control frame 1316.The all STA transferring the COCA response made CF-poll 1310 can intercept the UL transmitting and scheduling announcement frame 1316 from AP1302.If the ID of STA is included in this UL transmitting and scheduling, so this STA can transmit its data according to the scheduling of instruction to AP1302.In the example depicted in fig. 13, STA1304 and 1306 sends data 1320a and 1320b respectively according to the scheduling provided in notice 1316.AP1302 can confirm these data respectively with ACK frame 1322a and 1322b.

For the STA not having uplink data to transmit, this STA can not respond CF-poll, and this AP can at multiple SIFS week after date, resend CF-poll in the scheduled time or at next CFP.Alternatively, this STA can send negative instruction (NAK), with the uplink data indicating it will not send to AP.This method may need orthogonal sequence/lead code to carry at least one bit information (affirmation and negation instruction).The method of the carry information of explicit or implicit expression described below can be used.

Figure 14 is the signal graph 1400 of timing for the PS-poll of COCADL data retrieval (retrieval) and synchronous method.

AP1402, by being used in the bit carried in the short beacon frame of traffic indication map (TIM) or the beacon of amendment in TIM, PLCP header, MAC header or IE, carrying out explicitly and signals the COCA transmission of STA execution PS-poll frame to retrieve DL data.Alternatively, AP1402 by be used in amendment CP-poll frame in pattern in PLCP header or pilot value or the change of the relative phase in SIG field, CRC mask, scrambling initiate seed, implicitly signal STA and perform the COCA transmission of PS-poll frame to retrieve DL data.Similarly, also in beacon or short beacon, this implicit expression or the assignment of explicit COCA sequence can be sent with signal.Alternatively, in association response frame, can send with signal the configuration that the COCA of the PS-poll frame in order to retrieve DL data is transmitted.Can send active page segmentation, block segmentation or the subset of both with signal in a beacon, to limit the quantity of the STA by receiving TIM1408, its definable can transmit the equivalent set of the STA responded with the COCA of PS-poll frame or organize STA more.

Once receive instruction certainly in TIM1408, and know and transmit PS-poll in COCA mode, STA in first group will transmit its PS-poll frame, it can be aligned at the ending that the TIM-received carries frame (such as, beacon frame) and add IFS or some predetermined time interval places.STA (if there is) in subsequent group indicated in a beacon, can transmit after another trigger frame from AP.In the example depicted in fig. 14, each in STA1404 and 1406 receives instruction certainly in TIM1408, and correspondingly, can transmit PS-poll frame 1412a and 1412b respectively after TIM1408 after SIF cycle 1410a and 1410b.

AP1402 can receive and successfully can detect the several PS-poll frames transmitted in COCA mode, and, responsively, can the DL transmitting and scheduling of STA (such as, STA1404 and 1406) of transmission control frame 1414 in order to notice its PS-poll frame and be detected.The STA transferring COCAPS-poll frame can intercept the DL transmitting and scheduling announcement frame 1414 from AP1402.If the ID of STA is included in this DL transmitting and scheduling, then this STA can wake up to receive its DL data from AP according to this scheduling.In the example depicted in fig. 14, each in STA1404 and 1406 wakes up to receive its DL data 1416a and 1416b respectively.Can confirm to receive this DL data via ACK according to the STA that the scheduling noticed in schedule notice frame 1414 receives DL data from AP.In example shown in Figure 14, STA1404 receives DL data 1416a and send ACK frame 1418 after the SIFS cycle after receiving data 1416a.Transfer COCA frame but the STA not receiving DL transmitting and scheduling 1414 can transmit separately its PS-poll.

Figure 15 is the signal graph 1500 carrying out timing and synchronous illustrative methods, and wherein COCA transmission can be synchronized to predetermined UL and access interval or window.In example in fig .15, AP1502 sends the information accessing interval or window about predetermined UL in beacon or other frames 1508 with signal.In one embodiment, predefined UL access window can before the trigger frame 1510 from AP1502.Access during window at this predetermined UL, each in STA1504 and 1506 can transmit its respective COCA and transmit 1512a and 1512b.Then AP1502 can process COCA transmission (1514).

Figure 16 is for the timing of response made CF-poll and synchronous signal graph 1600 according to the method for Figure 15.In the example shown in Figure 16, first AP1602 can define and send multiple UL with signal and access window in beacon 1610.After beacon 1610, AP1602 can to use in the CF-poll frame 1612 of amendment a bit in PLCP header or MAC header or implicitly uses the pattern in the CF-poll frame 1612 of amendment in PLCP header or pilot value or changes of the relative phase in SIG field, CRC mask, scrambling to initiate seed by explicitly, with signal transmission, the response that CF-poll is made is carried out to the instruction of COCA transmission.Alternatively, in association response frame, can send with signal the configuration that the COCA of CF-poll frame is transmitted.Also can carry in CF-poll frame 1612 by the group ID of the STA of CF-poll institute poll.Alternatively, organize broadcast address to can be used in the da field of MAC header.AP1602 also can indicate the up link access window for STA to send response in COCA mode.

Should by the CF-poll frame 1612 transmitted once receive instruction COCA response from AP1602, the STA1604 of UL data, 1606 and 1608 each that has in group will transmit its respective response 1614a, 1614b and 1614c, and it can be aligned in the border being accessed window by the UL that AP1602 is indicated in CP-poll frame 1612 or other frames.

AP1602 can receive and successfully detect the several responses to CF-poll frame 1612 accessing in window at the UL of instruction, transmit in COCA mode, and responsively, can send for noticing the control frame 1616 that it responds the UL transmitting and scheduling of the STA be detected.

Transfer all STA that the COCA of CF-poll 1612 is responded and can intercept UL transmitting and scheduling announcement frame 1616 from AP1602.If the ID of STA is included in UL transmitting and scheduling, so it can transmit its data according to this scheduling to AP1602.In example in figure 16, each in STA1604 and 1606 can transmit data 1618a and 1618b according to this scheduling, and AP1602 can confirm to receive this data with respective ACK frame 1620a and 1620b.

Figure 17 is that the COCA of use for the method in Figure 15 and 16 is to the timing of the response that CF-poll is made and synchronous signal graph 1700.In the example shown in Figure 17, can define first in a beacon and send multiple UL with signal and access window.After beacon frame, AP1702 can be used in a bit in the beacon of the amendment of carrying TIM1707 or short beacon frame in TIM1707, PLCP header, MAC header or IE, carrys out the instruction that explicitly signal sends the COCA transmission of the PS-poll frame in order to retrieve DL data.Alternatively, AP1702 can be used in pattern in the CF-poll frame of amendment in PLCP header or pilot value or the change of the relative phase in SIG field, seed is initiated in CRC mask, scrambling, carrys out the instruction of the COCA transmission implicitly sending the PS-poll frame in order to retrieve DL data with signal.Also in beacon or short beacon, implicit expression or the assignment of explicit COCA sequence can be sent with signal.Alternatively, in association response frame, the configuration of the COCA transmission of the PS-poll frame in order to retrieve DL data can be sent with signal.Can send active page segmentation, block segmentation or the subset of both with signal in a beacon, to limit the quantity of the STA by receiving TIM1707, TIM1707 definable can transmit the equivalent set of the STA responded or multiple STA group with the COCA of PS-poll frame.AP1702 also can indicate STA to access window in order to the UL sending PS-poll frame in COCA mode.

Once receive instruction certainly in TIM1707, and know and should transmit PS-poll in COCA mode, STA1707 in the first set and 1706 each will transmit its respective PS-poll frame 1708a and 1708b, and PS-poll frame 1708a and 1708b can be aligned in the border being accessed window by the UL that AP is indicated in CF-poll frame or other frames.STA (if there is) in the subsequent group indicated in a beacon can transmit after from another trigger frame of AP1702.

AP1702 can receive and successfully detect the several PS-poll frames transmitted in COCA mode, and, responsively, can the DL transmitting and scheduling of STA of transmission control frame 1710 in order to notice its PS-poll frame and be detected.The STA transferring COCAPS-poll frame can intercept the DL transmitting and scheduling announcement frame 1710 from AP1702.If the ID of STA is included in this DL transmitting and scheduling 1710, this STA can wake up to receive its DL data from AP1702 according to this scheduling.In the example shown in Figure 17, each in STA1704 and 1706 wakes up to receive its respective DL data 1712a and 1712b.STA1704 uses ACK frame 1714 to confirm to receive DL data 1712a.Transfer COCA frame but the STA not receiving DL transmitting and scheduling (after a while) separately can transmit its PS-poll.

When multiple UL control frame is transmitted simultaneously with orthogonal manner, can not use existing frame structure, this frame structure uses Physical Layer Convergence process (PLCP) header and medium access control (MAC) header to identify STA.Execution mode described by this can be provided for STA and know method for distinguishing with the bolter of the UL control frame guaranteed AP identifiable design and be transmitted simultaneously.When AP successfully have received one or more COCA frame, it needs to identify the bolter of this COCA frame in order to perform corresponding subsequent process (such as described above).

Figure 18 is the signal graph 1800 of the illustrative methods of the orthogonal COCA sequence of assigning for COCA transmission.In the example shown in Figure 18, different orthogonal COCA sequences is divided each STA1802 and 1804 (1808) tasked in COCA group by AP1806 in advance.As one group of STA that AP1806 configuration pin is transmitted COCA, group configuration IE/ field (such as described above) can be used to send orthogonal COCA sequence to each STA signal and to assign (1810).

Each STA in COCA group obtains the information of orthogonal COCA sequence to be used in its COCA transmission by the frame containing group configuration IE/ field from AP receiving package.Then, the man-to-man mapping between the ID (its may be embodied as such as MAC Address, AID, PAID or AP and STA reach an agreement on consistent other forms of ID) that can be based upon orthogonal COCA sequence index and STA.

When AP1806 successfully receives one or several COCA frame (1812), this AP1806 can obtain the index of each orthogonal COCA sequence received, and retrieves the ID (1814) transmitting STA according to the man-to-man mapping of setting up between orthogonal COCA sequence index and the ID of STA.Then, AP1806 can carry out subsequent process (1816) with identified STA.

Figure 19 is the signal graph 1900 of illustrative methods selected for the STA of the orthogonal COCA sequence of COCA transmission.In example shown in Figure 19, AP1906 assigns orthogonal COCA sequence pond (1908) to COCA group (and the STA1902 and 1904 in group) in advance.AP1906 also available signal sends the rule of orthogonal sequence/lead code selection.When AP is configured one group of STA for COCA transmission, group configuration IE/ field (such as described above) signal can be used to send orthogonal COCA sequence pond to each in STA1902 and 1904 and to assign (1910).Alternatively, assignment and/or the random rule in orthogonal sequence/lead code pond can be specified in a standard, and therefore it can not be sent to STA with signal.

Such as, COCA sequence pond can be determined uniquely by COCA group ID.Therefore, the group ID that STA receives in group configuration IE/ field implicitly can send the information in the COCA sequence pond for COCA transmission with signal.In another example, the selective rule of COCA sequence can be implemented as Hash (Hash) function of AID, timestamp, BSSID or MAC Address etc.Therefore, STA can obtain its orthogonal sequence/lead code that should use in COCA transmission: sequence index=Hash (AID, BSSID, TSF) according to the following formula provided.

Each STA1902 and 1904 in COCA group is by comprising the frame of group configuration IE/ field to obtain the information in COCA sequence selection rule and the orthogonal COCA sequence pond for COCA transmission from AP1906 reception.Each in STA can select a COCA sequence according to this selective rule from COCA sequence pond.

When AP1906 successfully receives one or several COCA frame (1912), AP1906 can obtain the index (1914) of each received orthogonal COCA sequence.But it may not obtain the ID transmitting STA.Such as, when using random rule, AP1906 may cannot determine the ID of bolter completely.Another act one example, when orthogonal sequence/lead code selective rule is the hash function of AID, timestamp and BSSID or MAC Address, AP1906 unambiguously may determine the ID of bolter.When two or more STA select identical sequence, contention solution can in order to solve this uncertainty.

AP1906 can use the interim ID of STA to proceed to subsequent process (1916) in the frame of the next STA of sending to.The interim ID of STA can be the index of the COCA sequence receiving/detect simply.Interim ID can be used for replacing AID or PAID (or STAID of other types) in PLCP header or MAC header.

STA can receive from AP1906 the frame comprising interim ID (namely receive/index of COCA sequence that detects).If index and the reception of its COCA sequence transmitted/index of COCA sequence that detects matches (1918), and STA can know that its COCA transmission (i.e. orthogonal sequence/lead code) is successfully received by AP1906 and the object of this frame is exactly this.STA can use its STAID to proceed to subsequent process (1920).

Provided below is the example of response that CF-poll is made and the DL data retrieval based on TIM.

Figure 20 is the exemplary signal graph 2000 using the UL data transmitted the COCA of the response that CF-poll frame is made to transmit.In example in fig. 20, AP2002 use for each STA2004,2006 and 2008 interim ID (i.e. each reception/index of COCA sequence of detection) notice UL transmitting and scheduling (2014).Once receive UL transmitting and scheduling 2014, STA will check whether the index comprising the response to CF-poll that it transmits.If answer is affirmative, this STA can know that its COCA transmits (i.e. orthogonal sequence/lead code) and successfully received by AP.Then, STA can continue to use its STAID to transmit its UL data to AP2002 according to this UL transmitting and scheduling.In example in fig. 20, each in STA2004 and 2006 transmits data 2016A and 2016B.AP2002 uses ACK frame 2018A and 2018B to confirm respectively to receive this data.When two or more STA selects identical orthogonal sequence/lead code, AP maybe may can not detect this sequence.

If AP does not detect this sequence, this sequence index can not be included in follow-up UL transmitting and scheduling 2014.Then, the STA before transferring sequence can think that it is not detected by AP2002 the response made for CF-poll, and again attempts in CFP afterwards or channel contention window afterwards subsequently.

If AP successfully detects this sequence, AP2002 can use the index of the COCA sequence detected to notice UL transmitting and scheduling 2014.The STA before transmitting this sequence can think that it is successful for the response that CF-poll is made, and correspondingly respective STAID can be used to transmit its UL data to AP2002 according to this UL transmitting and scheduling.Their UL data may have conflict, and correspondingly, and AP2002 may be able to or can not successfully decode the one in the data that simultaneously receive.

The data of a STA if AP2002 successfully decodes, it can send the ACK frame of the ID with corresponding STA.Then contention solution can be solved.The STA receiving the ACK with its STAID knows that its UL data are successfully decoded.Other STA simultaneously transmitting its data can attempt after a while again (in CFP afterwards or channel contention window afterwards).

Any data if AP does not successfully decode, can not send ACK.The STA transmitting its data at the same time can attempt after a while again (in CFP or channel contention window).

In another example, AP comes implicitly to the STA dispatch sequence in COCA group by the order of affirmative TIM.Mapping between the order of the affirmative instruction in TIM and orthogonal sequence/lead code can predefine in a standard.Orthogonal sequence/lead code set sequence/lead code N1, sequence/lead code N2 ..., sequence/lead code Nk} can be mapped to k TIM instruction certainly.When STA wakes up listen for beacons and TIM, if this STA receives the affirmative instruction for himself in TIM, this STA can read other entries in TIM and obtains its order in TIM.Then, STA can obtain according to the index of mapping predetermined in TIM certainly instruction and orthogonal sequence/lead code the index that this STA should be used for the orthogonal sequence/lead code of COCAPS-polled transmission.Such as, the affirmative instruction that STA receives can be p instruction certainly in TIM.Herein, orthogonal sequence/lead code Np can be used for its COCAPS-polled transmission by this STA.A beacon or short beacon frame can pointer to the orthogonal COCA arrangement set of one or several beacon interval.Other behaviors that AP with STA uses COCAPS-poll to carry out down link data retrieval and process can with above identical with reference to described by Figure 20.

Current IEEE802.11 is not provided in carry information on multiple control channel simultaneously transmitted.But, there is process and scene that multiple control channel simultaneously transmitted needs carry information, such as short message.In described herein the execution mode providing and make information can be carried at the control frame on multiple control channel transmitted simultaneously.

In some scenes, STA may need in COCA transmission, to carry some information (information such as, seldom measured) to AP.Such as, STA may need to carry instruction and is greater than the information of threshold value in the uplink data amount at STA place or indicates the information being better than threshold value at the channel condition at STA place.Details can be dependent on concrete service condition with the amount of information associated be carried in COCA transmission.The illustrative methods of carry information in COCA transmission is described below.

In one embodiment, orthogonal COCA sequence pond can be divided into N number of subset in advance in advance.Except the above-mentioned orthogonal sequence/lead code selective rule mentioned, the STA performing COCA transmission also can select subset from N number of COCA sequence subset.Predetermined orthogonal sequence/lead code sub-set selection rule can being specified in a standard, in each COCA transmission, implicitly carrying maximum log by correspondingly selecting the subset of COCA sequence to allow STA ₂the information of N bit.

In another embodiment, orthogonal COCA sequence pond can be divided into N number of subset in advance in advance, and can specify predetermined orthogonal sequence/lead code sub-set selection rule in a standard.Such as, when the response that use is made CF-poll, N number of grade of uplink data amount can be mapped to N number of COCA sequence subset.The STA performing COCA transmission correspondingly can select subset from this N number of COCA sequence subset.Such as, when the response that use is made CF-poll, COCA sequence subset can be selected according to the amount of the uplink data at STA place.Then, in selected subset, STA can select a COCA sequence according to orthogonal sequence/lead code selective rule the hash function of STAID, BSSID etc. (random or).Then, AP receives and the COCA detected from STA transmits, and it can obtain the index of the COCA sequence of reception and corresponding subset index.Then, AP can retrieve implicit information according to predetermined orthogonal sequence/lead code sub-set selection rule.

Figure 21 is the figure of the exemplary COCA frame 2100 carrying message and/or information.COCA frame can comprise M OFDM symbol.Selected orthogonal sequence/lead code (such as, for permanent envelope zero auto-correlation (CAZAC) multiphase sequence that the COCA of STA transmits) can be mapped to each OFDM symbol.M in this M OFDM symbol ₁can be used for carry information.In example shown in figure 21, d ₁i=1,2 ... the information of carrying on COCA frame 2100, and S is the orthogonal sequence/lead code for COCA frame 2100.

embodiment

1, a kind of method of coordination orthogonal channel access (COCA) between multiple wireless transmitter/receiver unit (WTRU), the method comprises WTRU reception and uploads at channel the triggering serving line link (UL) control frame with other WTRU of at least one in described multiple WTRU simultaneously.

2, the method according to embodiment 1, also comprise in response to the described triggering of reception, described WTRU transmits described control frame on that channel.

3, the method according to embodiment 1 or 2, wherein said control frame is the one in power-save poll (PS-poll frame) and the response made coordination function poll (CF-poll) frame.

4, according to the method in embodiment 1-3 described in any one, information is included in described control frame by wherein said WTRU.

5, the method according to embodiment 4, provides the instruction being greater than first threshold in the amount of the UL data at described WTRU place comprising the described information in described control frame.

6, the method according to embodiment 4 or 5, provides the instruction being better than Second Threshold at the channel condition at described WTRU place comprising the described information in described control frame.

7, according to the method in embodiment 2-6 described in any one, wherein said WTRU uses the one in multiple orthogonal COCA sequence to transmit described control frame.

8, the method according to embodiment 7, the described one in wherein said multiple orthogonal COCA sequence is given described WTRU by pre-assignment.

9, the method according to embodiment 7 or 8, wherein said WTRU tasks the orthogonal COCA sequence pond of the group that described WTRU is subordinate to from dividing the described one selected in described multiple orthogonal COCA sequence.

10, the method according to embodiment 9, wherein said orthogonal COCA sequence pond is divided into N number of subset in advance.

11, the method according to embodiment 9 or 10, at least one in wherein said N number of subset is associated with rule, and this rule allows to select the WTRU of orthogonal COCA sequence respective in the described at least one in described N number of subset to transmit maximum log when transmitting described control frame ₂the information of N number of bit.

12, according to the method in embodiment 9-11 described in any one, wherein said orthogonal COCA sequence pond is divided into N number of subset in advance.

13, according to the method in embodiment 9-12 described in any one, wherein the UL data of N number of grade are mapped to described N number of subset.

14, according to the method in embodiment 1-13 described in any one, wherein said control frame comprises M OFDM (OFDM) symbol.

15, according to the method in embodiment 1-14 described in any one, the orthogonal COCA sequence selected in it is mapped to each in a described M OFDM symbol.

16, according to the method in embodiment 1-15 described in any one, the subset M in a wherein said M OFDM symbol ₁carry described information.

17, according to the method in embodiment 1-16 described in any one, also comprising described WTRU by the capability information element (IE) in the one in control frame or management frames being set to indicate described WTRU to have the ability to carry out COCA process, indicating described WTRU to have the ability to carry out COCA process.

18, according to the method in embodiment 1-17 described in any one, also comprise described WTRU and support that son field comprises the information of each COCA application supported for described WTRU by the COCA in information field, indicate described WTRU to have the ability to carry out COCA process.

19, according to the method in embodiment 1-18 described in any one, also comprising described WTRU by indicating described WTRU to carry out the described ability of COCA process in COCA tenability IE, indicating described WTRU to have the ability to carry out COCA process.

20, a kind of wireless transmitter/receiver unit (WTRU) comprising receiving element, described receiving element is configured to receive uploads at channel the triggering serving line link (UL) control frame with at least another other WTRU simultaneously.

21, the WTRU according to embodiment 20, also comprises transmitter unit, and described transmitter unit is configured to, in response to the described triggering of reception, transmit described control frame on that channel.

22, the WTRU according to embodiment 20 or 21, wherein said control frame is the one in power-save poll (PS-poll frame) or the response made coordination function poll (CF-poll) frame.

23, according to the WTRU in embodiment 20-22 described in any one, wherein said WTRU is that the non-access point (non-AP) in Institute of Electrical and Electric Engineers (IEEE) 802.11 Basic Service Set (BSS) stands (STA).

24, one is configured to the base station of coordinating orthogonal channel access (COCA) between multiple wireless transmitter/receiver unit (WTRU), described base station comprises transmitter unit, described transmitter unit be configured to trigger in described multiple WTRU at least both upload at channel simultaneously and serve line link (UL) control frame.

25, the base station according to embodiment 24, also comprises receiving element, and described receiving element is configured to receive in response to described triggering by the respective control frame carrying out transmitting simultaneously from each described at least two WTRU.

26, the base station according to embodiment 24 or 25, wherein said base station is the access point (AP) in Institute of Electrical and Electric Engineers (IEEE) 802.11 Basic Service Set (BSS).

27, the base station according to embodiment 25 or 26, wherein said receiving element to be also configured to described in from described multiple WTRU at least that both receive the instruction that these WTRU have the ability of carrying out COCA process.

28, according to the base station in embodiment 24-28 described in any one, wherein said base station also comprises processing unit, and described processing unit is configured to divide into groups at least two WTRU described in simultaneously carrying out on channel in the COCA group of UL control frame transmission based at least one criterion.

29, the base station according to embodiment 28, at least one criterion wherein said is channel of operation width, received power, service quality (QoS) priority and demand in base station, synchronous, dispatching requirement, sleep scheduling, locus, the characteristic of channel, at least one in WTRU ability and preference, WTRU type, power constraint, operator scheme or channel quality.

30, according to the base station in embodiment 24-29 described in any one, the one that wherein said transmitter unit is also configured to use each of frame described in described multiple WTRU at least in both comprising COCA group configuration IE to notify in multiple grouping.

31, according to the base station in embodiment 24-29 described in any one, wherein said transmitter unit is also configured to transmit down link (DL) by each described in described multiple WTRU at least in both and manages control frame, and to trigger in described multiple WTRU described, and at least both transmit UL control frame simultaneously on channel.

32, according to the base station in embodiment 24-31 described in any one, wherein said transmitter unit is also configured to by transmitting the frame comprising traffic indication map (TIM), to trigger in described multiple WTRU described, and at least both simultaneously transmit UL control frame on channel, and to be used to guide in described multiple WTRU described that at least both transmit PS-poll frames to retrieve DL data for described traffic indication map (TIM).

33, according to the base station in embodiment 25-31 described in any one, the each that wherein said receiving element to be also configured to described in from described multiple WTRU at least in both receives PS-poll frame, and the ending that wherein each PS-poll frame is aligned at the frame comprising described TIM adds interFrameGap (IFS) place.

34, according to the base station in embodiment 24-33 described in any one, each that wherein said transmitter unit to be also configured to described in described multiple WTRU at least in both transmits the information accessing window about predefined UL.

35, according to the base station in embodiment 24-34 described in any one, wherein said receiving element is also configured to receive control frame from each described in described multiple WTRU at least both during described predefined UL accesses window.

With particular combination, characteristic sum element is described although above, one of ordinary skill in the art will appreciate that each feature or element can be used alone, or when with any further feature and element carry out arbitrarily in conjunction with use.In addition, can implement in the computer program, software or the firmware that are performed by computer or processor in this method described, wherein said computer program, software or firmware are in a computer-readable storage medium involved.The example of computer-readable medium comprises electronic signal (by wired or wireless connections transmission) and computer-readable recording medium.The example of computer-readable recording medium is including, but not limited to the light medium of read-only memory (ROM), random access memory (RAM), register, buffer storage, semiconductor memory devices, magnetizing mediums (such as, internal hard drive and removable dish), magnet-optical medium and such as CD-ROM dish and digital versatile disc (DVD) and so on.The processor relevant with software can be used to the radio frequency transceiver implementing to use in WTRU, UE, terminal, base station, RNC or any master computer.

Claims (21)

1. a method for coordination orthogonal channel access (COCA) between multiple wireless transmitter/receiver unit (WTRU), the method comprises:

WTRU receives and uploads at channel the triggering serving line link (UL) control frame with other WTRU of at least one in described multiple WTRU simultaneously; And

In response to the described triggering of reception, described WTRU transmits described control frame on that channel.

2. method according to claim 1, wherein said control frame is power-save poll (PS-poll frame) or at least one in the response of coordination function poll (CF-poll) frame.

3. method according to claim 1, information is included in described control frame by wherein said WTRU.

4. method according to claim 3, following at least one is provided: the instruction being greater than first threshold in the amount of the UL data at described WTRU place comprising the described information in described control frame, or the instruction being better than Second Threshold at the channel condition at described WTRU place.

5. method according to claim 3, wherein said WTRU uses the one in multiple orthogonal COCA sequence to transmit described control frame.

6. method according to claim 5, the described one in wherein said multiple orthogonal COCA sequence is given described WTRU by pre-assignment.

7. method according to claim 5, wherein said WTRU tasks the orthogonal COCA sequence pond of the group that described WTRU is subordinate to from dividing the described one selected in described multiple orthogonal COCA sequence.

8. method according to claim 7, wherein:

Described orthogonal COCA sequence pond is divided into N number of subset in advance, and

At least one in described N number of subset is associated with rule, and this rule allows to select the WTRU of orthogonal COCA sequence respective in the described at least one in described N number of subset to transmit maximum log when transmitting described control frame ₂the information of N number of bit.

9. method according to claim 7, wherein:

Described orthogonal COCA sequence pond is divided into N number of subset in advance, and

The UL data of N number of grade are mapped to described N number of subset.

10. method according to claim 7, wherein:

Described control frame comprises M OFDM (OFDM) symbol,

Selected orthogonal COCA sequence is mapped to each in a described M OFDM symbol, and

Subset M in a described M OFDM symbol ₁carry described information.

11. methods according to claim 1, also comprise described WTRU and indicate described WTRU to have the ability of carrying out COCA process by following one:

Capability information element (IE) in one in control frame or management frames is set to indicate described WTRU to have the ability to carry out COCA process,

COCA in information field supports that son field comprises the information of each COCA application supported for described WTRU, or

In COCA tenability IE, indicate described WTRU to carry out the described ability of COCA process.

12. 1 kinds of wireless transmitter/receiver units (WTRU), this WTRU comprises:

Receiving element, is configured to receive and uploads at channel the triggering serving line link (UL) control frame with at least one other WTRU simultaneously;

Transmitter unit, is configured to, in response to the described triggering of reception, transmit described control frame on that channel.

13. WTRU according to claim 12, wherein said control frame is the one in power-save poll (PS-poll frame) or the response made coordination function poll (CF-poll) frame.

14. WTRU according to claim 12, wherein said WTRU are that the non-access point (non-AP) in Institute of Electrical and Electric Engineers (IEEE) 802.11 Basic Service Set (BSS) stands (STA).

15. 1 kinds are configured to the base station of coordinating orthogonal channel access (COCA) between multiple wireless transmitter/receiver unit (WTRU), and this base station comprises:

Transmitter unit, be configured to trigger in described multiple WTRU at least both upload at channel simultaneously and serve line link (UL) control frame; And

Receiving element, is configured to receive in response to described triggering by the respective control frame carrying out transmitting simultaneously from each described at least two WTRU.

16. base stations according to claim 15, wherein said base station is the access point (AP) in Institute of Electrical and Electric Engineers (IEEE) 802.11 Basic Service Set (BSS).

17. base stations according to claim 15, wherein:

Described receiving element to be also configured to described in from described multiple WTRU at least that both receive the instruction that these WTRU have the ability of carrying out COCA process, and

Described base station also comprises processing unit, described processing unit is configured to divide into groups at least two WTRU described in simultaneously carrying out on channel in the COCA group of UL control frame transmission based at least one criterion, at least one criterion wherein said is channel of operation width, received power, service quality (QoS) priority and demand in base station, synchronous, dispatching requirement, sleep scheduling, locus, the characteristic of channel, at least one in WTRU ability and preference, WTRU type, power constraint, operator scheme or channel quality.

18. base stations according to claim 15, the one that wherein said transmitter unit is also configured to use each of frame described in described multiple WTRU at least in both comprising COCA group configuration IE to notify in multiple grouping.

19. base stations according to claim 15, wherein said transmitter unit is also configured to transmit down link (DL) by each described in described multiple WTRU at least in both and manages control frame, and to trigger in described multiple WTRU described, and at least both transmit UL control frame simultaneously on channel.

20. base stations according to claim 15, wherein:

Described transmitter unit is also configured to by transmitting the frame comprising traffic indication map (TIM), to trigger in described multiple WTRU described, and at least both simultaneously transmit UL control frame on channel, to be used to guide in described multiple WTRU described that at least both transmit PS-poll frames to retrieve DL data for described traffic indication map (TIM), and

The each that described receiving element to be also configured to described in from described multiple WTRU at least in both receives PS-poll frame, and the ending that wherein each PS-poll frame is aligned at the frame comprising described TIM adds interFrameGap (IFS) place.

21. base stations according to claim 15, wherein:

The each that described transmitter unit to be also configured to described in described multiple WTRU at least in both transmits the information accessing window about predefine UL, and

Described receiving element is also configured to receive control frame from each described in described multiple WTRU at least both during described predefine UL accesses window.